Pros
MarketShare is a company full of promise. The strategy, modeling, and techincal teams are all extremely intelligent and capable. The company has a reputation for delivering results and as a leader in marketing measurement.
Cons
Unfortunately, MarketShare fails to live up to its full promise due to an unwillingness or inability to take on a corporate culture which verges on being THE definition "hostile work environment". I don't know many places where giving KY jelly and a picture of yourself as a gag gift for secret Santa would be considered work appropriate...but at MarketShare it might just get you a promotion. If you like mental abuse and consistent sexual innuendos, by all means. Take a job in MarketShare's NYC office. You'll love it.